FEATURE This product consists of a submersible pump and a biochemical filter. The pump body is made of molded engineering ABS plastic which can withstand shocks and rust. Made of stainless steel, the pump shaft can be used in fresh water and seawater. The motor is sealed inside the body with resin. With excellent water resistance and high insulation strength, and with a thermal protector, it is safe and reliable. Multi-functional design, for various purposes in one pump, such as oxygenation, filtration, and UV sterilization 4 in 1 (SP-B and SP-C series do not include UV light). With a portable assembly structure, the filter can be easily set up with 1~2 filter cylinders, using special biochemical filter cotton. It is most suitable for cultivating effective nitro bacteria and cleaning water.